/**
 *       Copyright (c) 2012 Lukas Zaruba
 *
 *   This file is part of Robot Playground.
 *
 *   Robot Playground is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Robot Playground is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with Robot Playground. If not, see <http://www.gnu.org/licenses/>.
 */
package net.zarubsys.commons.scripting.internal;

import java.util.List;

import net.zarubsys.commons.scripting.ParsedStatement;
import net.zarubsys.commons.scripting.ScriptLocator;
import net.zarubsys.commons.scripting.ScriptingEnvironment;
import net.zarubsys.commons.scripting.ScriptingException;

import org.apache.log4j.Level;

/**
 * Based on scripting language from Media Solutions Slovakia, a.s.
 * @author Lukas Zaruba, lukas.zaruba@gmail.com
 */
public class BlockStatement extends ParsedStatement {
	
	private final List<ParsedStatement> innerStats;

	/**
	 * @param name
	 * @param lineNumber
	 * @param charNumber
	 */
	public BlockStatement(String name, ScriptLocator locator, List<ParsedStatement> innerStats) {
		super(name, locator);
        this.innerStats = innerStats;
	}

	@Override
	public Object execute(ScriptingEnvironment env) throws ScriptingException {
        Object ret = null;
    	for (ParsedStatement stat : innerStats) {
    		if (env.isStopped()) return ret;
    		try {
    			ret = stat.execute(env);
    		} catch (ScriptBreakException e) {
    			env.getScriptLog().log(Level.INFO, "Intentionally stopped " + e.getMessage());
    		} catch (ScriptingException e) {
    			throw e;
    		} catch (Exception e) {
    			throw new ScriptingException("Error while executing statement " + stat.getName(), e, getLocator());
    		}
    	}
        return ret;
	}

    @Override
	protected String getString() {
    	StringBuilder sb = new StringBuilder();
    	for (ParsedStatement st : innerStats) {
    		sb.append(st.toString());
            sb.append('\n');
        }		
    	return sb.toString();
    }

}
